Also in the spotlight, shares of Transocean
RIG, -2.13%
fell 0.7% to $74.39. A Transocean spokesman said BP leased the company's semi-submersible Deepwater Horizon rig for its discovery in the deepwater Keathley Canyon in the Gulf of Mexico.

The Horizon rig operates in up to 10,000 feet of water, with a maximum crew of 130 and an average day rate of $458,000 to $517,000. The contract on the rig began in October 2007 and runs into 2010.

Shares of Sunoco
SUN, -1.28%
fell 36 cents, or 1.4%, to $25.28. The refiner said it will sell its retail heating-oil and propane distribution business to Superior Plus Corp.

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